August 29, 2022

The source data of the HighScope Perry Preschool Project cannot be publicly posted. However, researchers interested in replicating our results can get immediate access to the data. If you are interested in replication of the results, contact jlgarci@clemson.edu, who will guide you through the steps to gain immediate access for replication purposes. 

This replication folder is divided into two subfolders. The subfolder resultgeneration contains .do files generating intermediary datasets that are used in the .do files in the subfolder resultdisplay. The resultdisplay folder contains .do files generating displays such as figures and tables.

All of the .do files in both subfolders use a processed .dta file that puts together multiple rounds of data collection. The construction of such .dta file is an enterprise of its own. Researchers interested in replicating the results will be provided with the processed .dta file and the instructions to construct it. 

The .do files included in this replication folder allow researchers to generate the main results requiring non-trivial computations. Tables 1, 4, A.1 to A.7 and Figures 1, 2, and A.1 to A.3 are straightforward data descriptions, so we do not include the .do files generating them. Once researchers have access to the processed data, they can contact jlgarci@clemson.edu if questions arise in constructing those tables and figures or the tables and figures listed below. 

Description of resultgeneration subfolder: 
1. Estimates_participants.do
This file uses the processed Perry data to estimate the different treatment effects and the corresponding p-values (asymptotic, permutation and bootstrap) for the outcomes of the Perry participants.
2. Estimates_children.do
This file uses the processed Perry data to estimate the different treatment effects and the corresponding p-values (asymptotic, permutation and bootstrap) for outcomes of the biological children of the Perry participants.
3. Estimates_nonbio.do
This file does the same as the file #2 above but for including non-biological children of the Perry participants.
4. Estimates_nocutoffs.do
This file does the same as the file #2 above, with the difference that we don't impose any age-cutofs on the outcomes of the biological children of the Perry participants.

Description of resultdisplay subfolder: 
5. Table_main_participants.do
This loads the estimates from file #1 above and outputs them in a table .tex format. This file prepares Table #2 in the main paper.
6. Table_bygender.do
This loads the estimates from file #2 above and outputs them in a table .tex format. This file prepares Table #3 in the main paper.
7. Table_main_children.do
This loads the estimates from file #2 above and outputs them in a table .tex format. This file prepares Table #A.8 in the appendix of the paper.
8. Table_main_children_nonbio.do
This loads the estimates from file #3 above and outputs them in a table .tex format. This file prepares Table #A.9 in the appendix of the paper.
9. Table_main_children.do
This loads the estimates from file #5 above and outputs them in a table .tex format. This file prepares Table #A.10 in the appendix of the paper.